20001113000 has 128 divisors (see below), whose sum is σ = 51512423040. Its totient is φ = 7208320000.

The previous prime is 20001112997. The next prime is 20001113063. The reversal of 20001113000 is 31110002.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1234955 + ... + 1251045.

It is an arithmetic number, because the mean of its divisors is an integer number (402440805).

Almost surely, 2^20001113000 is an apocalyptic number.

20001113000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001113000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25756211520).

20001113000 is an abundant number, since it is smaller than the sum of its proper divisors (31511310040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001113000 is a wasteful number, since it uses less digits than its factorization.

20001113000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16236 (or 16222 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 20001113000 its reverse (31110002), we get a palindrome (20032223002).

The spelling of 20001113000 in words is "twenty billion, one million, one hundred thirteen thousand".